Hydro-Temp VVV - Page 49

Installation Manual 5.1.2
49
Fan runs continuously,
compressor runs normal
1. Thermostat fan setting turned to
“on” position.
1. Switch thermostat selector to off.
Unit inoperative
1. No power to unit.
1. Check unit electrical supply, fuses,
breakers, etc. Restore power.
2. Defective control wiring or
thermostat.
2. Repair wiring. Check thermostat
wiring. Replace thermostat.
3. Defective transformer.
3. Reset or replace transformer.
Fan operates, but compressor
inoperative
1. Thermostat not set properly.
1. Read thermostat instructions.
2. Low or high pressure limit tripping
and or locked out due to excess trips.
2. Repair condition causing excessive
pressures.
3. Internal protector activating,
operating.
3. Repair condition causing extreme
temperatures.
4. Faulty internal protector.
4. Replace compressor.
5. Freeze protector activating (well
water systems only)
5. Check water flow / replace
protector
6. Defective Compressor Drive.
6. Replace drive.
7. Defective compressor.
7. Replace compressor.
Reversing valve will not
1. No voltage to solenoid.
1. Correct voltage problem.
switch
2. Bad solenoid coil.
2. Replace coil.
3. Stuck valve.
3. Tap valve with hammer until it
switches or replace valve.
Operating pressures too high
and/or high
1. Too little water flow (cool cycle).
1. Check loop pump and flow.
pressure limit tripping
2. Clogged air filter (heat cycle).
2. Clean or replace air filter.
Check duct sizes.
3. Air restriction (heat cycle).
3. Check duct work for collapsed duct
line.
4. Bad high pressure limit.
4. Replace limit.
5. Unit overcharged.
5. Adjust charge.
Operating pressure too
1. Refrigerant leak.
1. Find and repair leak.
low and/or low pressure limit
tripping
2. Too little water flow (heat cycle).
2. Check loop pump and flow or
water supply.
3. Air restriction (cool cycle).
3. Check air filter, duct work, etc.
4. Bad low pressure limit.
4. Replace limit.
Freeze switch activating
(Reversing valve switches
1. Too little water (heat cycle).
1. Follow procedure previously
described.
During heating mode)
2. Freeze set too high.
2. Lower setting. Call factory.
** Well water systems only**
3. Bad freeze sensor.
3. Replace sensor.