dicated,  check  terminal  2  of  XF1  for  110  vac.  If 110  vac  is  not  indicated,  replace  fuse.  Check  for 110 vac at terminal 3 0f XF1. If 110 is not indi- cated, replace fuse. If 110 vac is indicated at ter- minals 2 and 3 of XF1, check for 30 vac at termi- nals  X1  and  X2  of  transformer  (T1).  If  30  vac  is not indicated, transformer is defective and should be replaced. If 30 vac is indicated, check terminals 2 and 3 of rectifier (CR1 ) for 30 vdc. If 30 vdc is not indicated, rectifier is defective and should be replaced. If 30 vdc is indicated, check terminal 2 of  XF2  for  30  vdc.  If  30  vdc  is  not  indicated,  re- place fuse. If 30 vdc is indicated at terminal 2 of thermostat   (S2),   replace  rotary  selector  switch (S1). (3)  Removal. (a)  Refer  to  figure  3–4  and  remove  the lower front access panel. (b) Remove  cover  from  junction  box  (fig. 3-10). (c)  Refer  to  figure  3-13  and  remove  the relay- (4)  Installation.   installation  is  the  reverse of removal. e. Time Delay Relay. (1)  General.  The  time  delay  relay  (K2)  is employed  in  the  start  circuit  to  delay  starting  of the  refrigerant  compressor  for  approximately  30 seconds  after  the  rotary  selector  switch  (S1)  has been  placed  in  the  COOL  position.  This  allows, the  fan  motor  to  start  and  come  up  to  operating speed  before  the  compressor  comes  on  the  line, preventing a power overload condition. (2)   Testing. (a)  With   power   off,   check   for   continuity between  terminals  2  and  3  and  5  and  7  of  time delay  relay  (K3).  If  continuity  is  not  indicated between terminals 2 and 3 and / or is indicated be- tween  terminals  5  and  7,  time  delay  relay  is  de- fective  and  must  be  replaced.  If  continuity  is  in- dicated  between  terminals  2  and  3  and/or  is  not indicated  between  terminals  5  and  7,  check  for phase ABC at phase sequence relay (K6), using a meter.  If  phasing  is  incorrect,  check  unit  incom- ing power. If phasing is correct, check terminal 2 of  relay  (K6)  for  110  vat.  If  110  vac  is  not  indi- cated,  relay  is  defective  and  should  be  replaced. If  110  vac  is  indicated,  check  terminal  2 of  XF1 for  110  vat.  If  110  vac  is  not  indicated,  replace fuse.  Check  for  110  vac  at  terminal  3  of  XF1.  If 110 is not indicated, replace fuse. If 110 vac is in- dicated at terminals 2 and 3 of XF1, check for 30 vac  at  terminals  X1  and  X2  of  transformer  (T1). If  30  vac  is  not  indicated,  transformer  is  defec- tive and should be replaced. If 30 vac is indicated, check  terminals  2  and  3  of  rectifier  (CRI)  for  30 vdc.  If  30  vdc  is  not  indicated,  rectifier  is  defec- tive and should be replaced. If 30 vdc is indicated, check  terminal  2  of  XF2  for  30  vdc.  If  30  vdc is  not  indicated,  replace  fuse.  If  30  vdc  is  indi- cated, check terminal 1 of TB2 for 30 vdc (rotary switch must be in COOL). If  30  vdc  is  not  indicated,  replace  rotary  switch (S1).  If  30  vdc  is  indicated,  check  terminal  2  of low-pressure  cutout  switch  (S7)  for  30  vdc.  If  30 vdc  is  not  indicated,  reset  switch  (S7),  and  re- check for 30 vdc. If 30 vdc is not indicated, replace low-pressure  cutout  switch  (S7).  If  30  vdc  is  in- dicated, check terminal 2 of high-pressure cutout switch   (S6).   If   30   vdc   is   not   indicated,   reset switch  (S6)  and  recheck  for  30  vdc.  If  30  vdc  is not indicated, replace high-pressure cutout switch (S6).  If  30  vdc  is  indicated,  check  terminal  3  of TB2 for 30 vdc. If 30 vdc is not indicated, remove plug  (P4)  and  check  resistance  between  pins  D and  E  of  connector  (J4).  If  no  resistance,  replace compressor. If resistance is indicated, replace con- nector  (J4).  lf  30  vdc  is  indicated  at  terminals  3 of TB2, check terminal 5 and 7 of time delay relay (K3)  for  30  vdc.  If  30  vdc  is  not  indicated  at terminal  7  of  K3,  replace  relay  (K3). (3) Removal. (a)  Refer  to  figure  3-4  and  remove  the lower from access panel. (b) Remove  cover  from  junction  box  (fig. 3-10). (c)  Refer  to  figure  3-13  and  remove  the relay. (4)  Installation.  Installation  is  the  reverse of removal. 3-32. Circuit Breaker a.  General.  The  circuit  breaker  is  a  3-pole,  sin- gle-throw,  series-trip  type  with  auxiliary  switch. The  5-ampere  circuit  breaker  protects  the  com- pressor  from  continuous  overcurrent  and  short circuits.  It  is  located  in  the  lower  right  corner  of the  junction  box.  Refer  to  figure  2–5  for  reset procedure. b. Testing.  With  power  off  and  circuit  breaker in  ON  position,  check  for  continuity  between  Al and A2, B1 and B2, C1 and C2, and C and NO. If continuity  is  not  indicated,  circuit  breaker  is  de- fective  and  must  be  replaced. c. Removal. (1)  Refer  to  figure  3-4  and  remove  the lower front access cover. (2)  Remove  from  junction  box  (fig.  3-10). (3)  Refer  to  figure  3-13  and  remove  the  cir- cuit  breaker. d. Installation.   Installation  is  the  reverse  of  re- moval. 3-20