Installation guide
Table l_Troubleshooting Guide_Cooling
SYMPTOM
Compressor a.d conde,set fa.
will .or start.
Compressor will i1ot
start b,t co,denser
fan runs.
CAUSE
Power Failure
Fuse bl_vn or ci_it breaker tripped
[_sfe_ive thenllostat, contacter, B3ns_rmer_ or c_lntrol relay
Insu_cient lille voltage
Incorrecl or _aulty wiring
Themlostat setSn_j too high
Faul_ wiring or loose _nnectiens in Compressor circuit
Conlpres_or motor b_rned Out, seized, or il_ternal
overload open
E)sfective run,start capacitor, overload, Start relay
One leg of 3-priase power deed
Three-phas_ scroll compressor
(W1 P048 a.d PY2Pg30-g60 only) Scroll ¢ompreasor is rotating in the wron_ direction
makes excessive noise, and there may
be a low pressure differe.tial.
Compressor cycles (other than
normally satisfying thermostat),
Compressor opiates co,tin,o_sly.
Excessive head pressure.
Head pressure too low.
Excessive s_ctio_1 pressure.
S_ction prese;tzr_ too low,
Ft_sfrigeralnt overcha_e or undercha_le
E_sfe_ive _lllpressot
Insu_cient lii_e vol_age
Blocked ¢_ndenser
[_sfe_ive run_sta_ capachor, overload or s_rt _l_y
[_sfe_ive _enllostat
Faul_ _i_denser-fan nlot_r or _pacitor
_e_'iction in refrigerant s_tem
[_ir_, air 61tot
Unit _i_der_ized for loed
Them_osta_ _et too low
Low re_gerant charge
LeakiTlg _lves in _._lllpressot
Air in S'?stern
Condenser c_ildirtyor restricted
Bir_jairfilter
Birh'c_ndenser c_il
Rsfrioerant overcha_ed
Air in S'?s:em
Condenser airresWictedorairshor_-cycling
Low re_gemnt charge
Compressor valvesleaking
ResB'icUoninliquidtube
High rieat load
Conlpres_o r valves leaking
Refrigerant overcharged
[_it?j air filter
Low re_er_nt charge
Metering device or low side restricted
Insu_cient evaporator airfl_rw
Tempemtore too lew in condiSoned area
O_door ambient below 40°F
Field4nsL_lled fiber<lrier resb'icted
REMEDY
Call power company.
Replace _se or reset circuit breaker.
Replace c_nlponerit.
D_rnline Cause al_d correct.
Check wirin_j diagram and rewire correctly.
Lower triermost_ s_il_g below room tenlperat_re.
Check wirin_j and repair Or replace.
D_rmine caLise
Replace _nlpressot.
D_rnline Cause al_d replace.
Replace _se or reset circuit breaker.
D_rmine caLise.
Correctthe direcgonsfr(_ationby reversingthe
3_phase power leadstothe unit.Sh_t d_ unit
_oall_ pressures_oequalize.
Recover _rigerai_t,eva_ale Sys_m, and recha_leto
capacitiesshO_l_ oi_nameplate.
Replace and d_rmii_e caLise.
D_rmine cause ai_dcorrect.
D_rmine cause ai_dcorrect.
D_rmine cause ai_dreplace.
Replace [hen1_ostat.
Replace.
Loca_e re_iric[@oi_ai_dremove.
Replace 61tot.
Decease Io3det i_oease uni__ize.
Reset thermostat.
Loca_e leak,repair,and recha_e.
Replace _nlpressot.
Recover _rigerant_eva_ale S'fs_m_and recha_e.
Clean coilor remove resiric_ion.
Replace 61tot.
Clean coil.
Recover excess _igerant.
Recover _rigerant_eva_ale S'fs_m_and recha_e.
D_rmine cause ai_dcorrect.
Check forleak_,repair,and rechar_'ie.
Replace _nlpressot.
Remove re_iric[@oi_.
Check _r source ai_delimii_ale.
Replace _nlpressot.
Recover excess _i_erant.
Replace Fi_er.
Check forleak_,repair,and recha_e.
Remove source sf restriction.
Increaseairquantity.Check _i_er replaceifnecessary.
Reset thermostat.
Installlow_ambientki_.
Replace.
SYMPTOM
E_n1_r_ will _1ot i_lit_,
Table 17--Troubleshootin,
CAUSE
Wa_r in gas line
NO power to _Jmace
NO 2€-v pa_er Supply to conWol circuit
Mi_wired or Ioo_._econl3e_ion$
B_rned-out hem anticipator in
thermostat
Brekel_ triermc_tat wire
Misali_ned spark ele_n_des
NO gas i_ main b_rners
[_ir_j air filter
Gas inp_ to _rnace too low
Unit _l_de_ized [or application
Restricted air_ow
Blower speed too low
Inadequate healing.
Limit switch _cles main bunnePa
Incomplete r_rnbus_ioln results in:
Poor _]ame characteristics. Aldeh_le odors, carbon monoxide, sooting
flame, floating flame
Guid_Heating
REMEDY
Drain. Install drip leg.
Check power s_egly _ses, wiring, or circ_i_ breaker.
Check Wans?ormer.
NOTE: Some tmnsformens have ir_emal overc_rrent
prete_ion that requires a cooI<lo_l_ period to rese:.
Check all wirin 9 and wirenut connections
Replace thermostat.
Run con_inui?j check. Replace wire if neceasar_,.
Check flanle i_ni_on and sense electrege pasitionil_.
P_j_st as necessan/.
.Check _as line for air. P_q_e as necet, sary.
NOTE: After p_rg_ng _as line of air, _it at least 5 minules f_r any
gas to dissipate before a:temp_ing to ligh: unit.
2. Check gas valve.
Clean or replace _il_eras necest, ar_,.
Check gas pressure at manifold match with that on
_ni_ nameplate.
Replace wi_ri proper _ni_ or add additional unit.
Clean or replace _il_er. Remove any restriction.
Use fasl_r speed tap if available, Or install abema_e
t*t_o_eF.
Check €oration of ble_er, _hermosL'_t heat anticipator settings,
temperature rise of _mit. _just as neceasar_,.
1.Tighten all screwa around burner c_mpartmect.
2. Cracked heat exchanger. Replace.
3. Unit overtired. Reduce inp_: (change orifices or
adlust gas line Or manifold pret,s_re).
€. Check burner alignment.
m36_